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Brandformex

Brand

Case Size▸

39–40mm

41–44mm

Lug-to-Lug▸

45–47mm

48–50mm

Movement▸

Other Automatic

Price Tier▸

Budget ($0–$249)

Budget–Mid ($250–$499)

Mid-Range ($500–$999)

Mid–Premium ($1,000–$1,499)

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Water Resistance▸

100M+

300M+

30M+

Brands/Formex/"Baby" Automatic COSC 300M "Bahama Blue"

"Baby" Automatic COSC 300M "Bahama Blue" selected view

Formex

🇨🇭 Biel, Switzerland

"Baby" Automatic COSC 300M "Bahama Blue"

Price Tier N/A

The Reef 39.5 mm with its Bahama Blue dial is the ultimate summer divers watch with exchangeable ceramic bezels and a patented fine adjustment system for a perfect fit in heat and humidity!

Metropolis Verdict

Who this watch is really for

developing data

Best for

Collectors comparing independent dive or sport watches with about 3000m of water resistance.
Collectors who want a chronograph from an independent brand rather than the usual big-brand shortlist.
Mechanical-watch buyers who want a proven automatic or hand-wound movement in an independent design.

Skip if

You want quartz convenience with minimal setting, winding, or service concerns.
You need a fully documented spec sheet before shortlisting.

Value note: On paper, the spec mix is sensible: mechanical movement, sapphire crystal, and usable water resistance. The value case is strongest if the design language is what you want.

Comparable watches

Automatic COSC 300M Green 39.5 mmA comparable same-brand dive/sport option from Formex.

Automatic COSC 300M Silver 39.5 mmA comparable same-brand dive/sport option from Formex.

Automatic COSC 300M White 39.5 mmA comparable same-brand dive/sport option from Formex.

Data status: Indexable catalog page with images, description, and core specs. Image count: 4. Populated spec fields: 4.

Brand Location🇨🇭 Biel, Switzerland

MovementAutomatic, Chronometer

Water Resistance300m / 30 Bar

Visit Brand Site

Technical Data Matrix

MovementAutomatic, Chronometer

MaterialsStainless steel, Ceramic, Bronze

Resistance300m / 30 Bar

CrystalSapphire

Formex

Independent microbrand based in 🇨🇭 Biel, Switzerland. Known for styles. Visit the official store for the full collection.

Visit Formex Official Store →

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